<template>
  <div class="login-container">
    <div class="login-container">
      <!-- 导航栏 -->
      <van-nav-bar class="page-nav-bar" title="登录" />
      <van-icon
        class="van-icon"
        slot="left"
        name="cross"
        @click="$router.back()"
      />
      <!-- 登录表单 -->
      <van-form @submit="onSubmit" ref="loginForm">
        <van-field
          name="mobile"
          v-model="user.mobile"
          :rules="userFormRules.mobile"
          placeholder="请输入手机号"
          type="number"
          maxlength="11"
        >
          <i slot="left-icon" class="toutiao toutiao-shouji"></i>
        </van-field>

        <van-field
          name="code"
          :rules="userFormRules.code"
          v-model="user.code"
          placeholder="请输入验证码"
          type="number"
          maxlength="6"
        >
          <i slot="left-icon" class="toutiao toutiao-yanzhengma"></i>
          <template #button>
            <!-- 倒计时 -->
            <van-count-down
              v-if="isCountDownShow"
              :time="1000 * 5"
              format="ss s"
              @finish="isCountDownShow = false"
            />
            <van-button
              native-type="button"
              class="send-sms-btn"
              @click="onSendSms"
              round
              size="small"
              type="primary"
              >发送验证码</van-button
            >
          </template>
        </van-field>
        <div class="login-btn-wrap" style="margin: 16px;">
          <van-button class="login-btn" block type="info" native-type="submit"
            >提交</van-button
          >
        </div>
      </van-form>
    </div>
  </div>
</template>

<script>
import { login, sendSms } from '@/api/user'
export default {
  name: 'Login',
  data () {
    return {
      user: {
        mobile: '',
        code: ''
      },
      userFormRules: {
        mobile: [
          {
            required: true,
            message: '手机号不能为空'
          },
          {
            pattern: /^1[3|5|7|8]\d{9}$/,
            message: '手机号格式错误'
          }
        ],
        code: [
          {
            required: true,
            message: '验证码不能为空'
          },
          {
            pattern: /^\d{6}$/,
            message: '验证码格式错误'
          }
        ]
      },
      isCountDownShow: false // 控制倒计时的显示和隐藏
    }
  },
  methods: {
    // 表单提交事件
    async onSubmit (values) {
      const user = this.user
      this.$toast.loading({
        // 在组件中可以直接通过 `this.$toast` 调用
        message: '登录中...',
        forbidClick: true, // 禁用背景点击
        duration: 0 // 持续时间，默认是 2000，如果为 0 则持续展示
      })
      try {
        const { data } = await login(user)
        this.$store.commit('setuser', data.data)
        this.$toast.success('登录成功')

        // 登录成功以后，跳转到原来页面
        // back 的方式不严谨，后面我们会进行优化
        this.$router.back()
      } catch (error) {
        if (error.response.status === 400) {
          this.$toast.fail('手机号或验证码错误')
        } else {
          this.$toast.fail('登录失败，请稍后重试')
        }
      }
    },
    // 验证手机验证码
    async onSendSms () {
      try {
        await this.$refs.loginForm.validate('mobile')
      } catch (error) {
        return console.log(error)
      }
      this.isCountDownShow = true
      try {
        await sendSms(this.user.mobile)
        this.$toast('发送成功')
      } catch (error) {
        this.isCountDownShow = false
        if (error.response.status === 429) {
          this.$toast('发送太频繁了，请稍微重试')
        } else {
          this.$toast('发送失败，请稍后重试')
        }
      }
    }
  }
}
</script>

<style scoped lang="less">
.login-container {
  .toutiao {
    font-size: 37px;
  }
  .send-sms-btn {
    width: 160px;
    height: 46px;
    line-height: 46px;
    background-color: #ededed;
    font-size: 22px;
    color: #666;
  }
  .login-btn-wrap {
    padding: 53px 33px;
    .login-btn {
      background-color: #6db4fb;
      border: none;
    }
  }
}

/deep/ .van-button--primary {
  border-color: #1989fa !important;
}
</style>
